US4763038A - Incandescent lamp unit - Google Patents

Incandescent lamp unit Download PDF

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Publication number
US4763038A
US4763038A US07/063,392 US6339287A US4763038A US 4763038 A US4763038 A US 4763038A US 6339287 A US6339287 A US 6339287A US 4763038 A US4763038 A US 4763038A
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US
United States
Prior art keywords
base
pinched portion
lugs
pinched
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/063,392
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English (en)
Inventor
Kazushige Takayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ichikoh Industries Ltd
Original Assignee
Ichikoh Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ichikoh Industries Ltd filed Critical Ichikoh Industries Ltd
Assigned to ICHIKOH INDUSTRIES LIMITED reassignment ICHIKOH INDUSTRIES LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: TAKAYAMA, KAZUSHIGE
Application granted granted Critical
Publication of US4763038A publication Critical patent/US4763038A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H01J5/56—Shape of the separate part

Definitions

  • the present invention relates to an incandescent lamp unit for use as an automotive headlight, and more particularly to an incandescent lamp unit of which a glass bulb has formed at the rear end thereof a pinched portion of a rectangular section having two opposite wide side faces and two opposite narrow side faces and which is held by a supporting plate or base made of a resilient metal.
  • FIGS. 1 to 3 show such a conventional incandescent lamp unit of which a bulb 1 has formed at the rear end thereof a single pinched portion 2 which is rectangular in sectional form. As shown in FIG. 2, the pinched portion 2 has wide side faces 21 and narrow side faces 22. A filament 23 is disposed in the sealed inner space of the bulb 1, and lead-in wires 15 connected to the filament 23 are laid as buried in the pinched portion 2, led out at the lower end thereof and connected to terminals 16.
  • the reference numeral 3 indicates a single disk-shaped, bulb-supporting plate or base made of a resilient material. The base 3 has various cuts therein by punching.
  • the cuts inlcude a one extending longitudinally in the center of the base 3 and two small oblique cuts each adjoining the longitudinal cut.
  • two lugs 6 are formed of which the ends are resiliently engaged each in a recess 17 formed in each of the wide side faces 21 of the pinched portion 2.
  • a triangular lug 8 is formed by the oblique cutting at each end of the longitudinal cut in the base 3 and abuts each narrow side face 22 of the pinched portion 2.
  • These lugs 8 are bent down from the base 3 perpendicularly to the axis of the longitudinal cut and thus defines the narrow sides of the elongated opening 7 (longitudinal cut).
  • the pinched portion 2 of the bulb 1 is inserted into the opening 7 in the base 3 and the lugs 6 are elastically engaged on the wide side faces 21, respectively, of the pinched portion 2 while the lugs 8 are engaged on the narrow side faces 22 so that the pinched portion 2 is held in the base 3.
  • the base 3 is fixed to a cylindrical holder 18 by calking or otherwise.
  • the lugs 6 and 8 which are engaged on the pinched portion 2 to hold the latter are made by working the bulb-supporting plate or base 3 by punching; therefore, the lugs 6 engaged on the wide side faces 21 have the width L thereof limited to approximately a half of the width D of the elongated opening 7 as shown in FIG. 3.
  • the width D is made nearly equal to, or somehow larger than, the distance between the wide side faces, namely, the width of the pinched portion 2.
  • the arm length of the lugs 6, that is, the width L, is substantially limited to about a half of the pinched-portion width, and so the ratio of the arm length of the lugs 6 to the length of the pinched portion 2, namely, the length of the pinched portion 2 along the led-out direction of the lead wide 15, is small.
  • the larger this ratio the more stably the bulb 1 is held by the base 3, but in the conventional lamp unit in which the lugs 6 are formed by punching the single base 3, there is a problem that the arm length of the lugs 6 cannot be made larger for the aforementioned reason.
  • the present invention seeks to overcome the above-mentioned drawbacks of the conventional techniques by providing an incandescent lamp unit of which the bulb can be more stably held by the base.
  • the present invention also seeks to provide an incandescent lamp unit in which the arm length of the lugs abutting the narrow side faces of the pinched portion can be selected correspondingly to the length of the pinched portion but independently of the width of the pinched portions.
  • an incandescent lamp unit comprising a metallic supporting plate or base assembly which supports the pinched portion of a rectangular section having two opposite wide side faces and two opposite narrow side faces, the base assembly being composed of a first base having formed therein a first opening in which the pinched portion is introduced and also having first lug members which extend along the edges of the opening and abut the upper portion of the pinched portion to limit the latter from moving longitudinally and laterally, and a second base mounted on the first base and having formed therein a second opening in which the pinched portion is introduced and also having second lug members which extend along the edges of the opening and abut the lower portion of the pinched portion to limit the pinched portion from moving in a plane perpendicular to the pinched portion, the second base being fixed to a holder, the second lug members being formed on the second base independently of the first lug members so that the arm length of the second lug members can be made, thus permitting to hold the pinched portion stably.
  • FIG. 1 is an axial sectional view of a conventional incandescent lamp unit
  • FIG. 2 is a cross sectional view taken along the line II--II of FIG. 1;
  • FIG. 3 is a sectional view taken along the line III--III of FIG. 2;
  • FIGS. 4 to 14 show an embodiment of incandescent lamp unit according to the present invention, of which
  • FIG. 4 is a front view of the incandescent lamp unit
  • FIG. 5 is a sectional view taken along the line V--V in FIG. 4;
  • FIG. 6 is also a sectional view taken along the line VI--VI of FIG. 4;
  • FIG. 7 is a plan view of the first metallic base
  • FIG. 8 is a bottom view of the first metallic base
  • FIG. 9 is a sectional view taken along the line IX--IX in FIG. 7;
  • FIG. 10 is a partially sectioanl veiw from the direction X in FIG. 7;
  • FIG. 11 is a plan view of the second metallic base
  • FIG. 12 is a bottom view of the second metallic base
  • FIG. 13 is a sectional veiw taken along the line XIII--XIII of FIG. 11;
  • FIG. 14 is a view from the XIV direction in FIG. 11;
  • FIGS. 15 to 17 show a variant of the embodiment shown in FIGS. 4 to 14, of which
  • FIG. 15 is an axial sectional view of the incandescent lamp unit according to the variant of the present invention.
  • FIG. 16 is a front view showing the upper and lower portions composing the second base
  • FIG. 17 is a sectional view of the upper and lower portions of the second base
  • FIGS. 18 and 19 are axial sectional views, respectively, of antoher variant of the present invention, corresponding to FIGS. 5 and 6 of the first embodiment, showing that the upper and lower portions of the second base are disposed as spaced from each other in the direction in which the pinched portion is introduced into the base assembly.
  • an incadescent lamp unit 30 comprises an incandescent lamp bulb 31 containing a filament 41 and which has a pinched portion 40 of a rectangular section at the rear end thereof, a first metallic base 33 having a plurality of lugs 61 which hold the upper portion of the pinched portion 40, and a second metallic base 34 having a pair of lugs 71 which hold the lower portion of the pinched portion 40, the first base 33 and second base 34 being fixed to each other with the rear face of the top portion 58 of the first base 33 closely attached to the front face of the top portion 70 of the second base 34.
  • the first base 33 is made of a resilient metal, and it takes the form of a cylinder generally opening downward as shown in FIGS. 7 to 9.
  • the top portion 58 of the first base 33 has formed by punching therein a first opening 59 in which the pinched portion 40 can be introduced.
  • Two paris of lugs 61a are disposed respectively in postions where they catch the two opposite wide side faces 150 of the pinched portion 40 which is shown as a dash line in FIG.
  • each pair of lugs 61a is disposed in a position adjacent to the opposite narrow side faces 151 of the pinched portion 40.
  • These lugs 61a serve to limit the pinched portion 40 from moving in the direction of the width of the latter, that is, laterally.
  • the lugs 61b are disposed correspondingly to the two narrow side faces 151, respectively, and limit the pinched portion 40 from moving a direction perpendicular to the direction of the width of the pinch portion 40, namely longitudinally.
  • the first horizontal lugs 61a and second horizontal lugs 61b form together a first lug means.
  • the first base 33 has four engagement pawls 62 formed as regularly spaced circumferentially on the lower end portion thereof.
  • Each of these engagement pawls 62 is formed as a portion between two neighboring cuts each like the half of a round-ended elongated hole, provided in the lower edge of the first cylindrical base 33.
  • a protrusion 63 is formed on the inner surface of the body section of the first base 33 correspondingly to each of the engagement pawls 62.
  • the second base 34 is made of a resilient metal.
  • This second base 34 also takes the form of a cylinder higher than the first base 33 and which is opened at the bottom end thereof.
  • the top portion 70 of the second base 34 has formed by punching therein a second opening 70a into which the pinched portion 40 can be introduced.
  • lugs 71 are formed at the edges of the second opening 70a.
  • lugs 71 are curved at the central portion thereof and substantially flat at the end portions thereof.
  • the second base 34 has formed as regularly spaced circumferentially at the lower edge thereof four outwardly bent pawls 72, and also there are formed in the circumfenrential surface thereof four circular throughholes 73 correspondingly to and above the pawls 72. Further, there is formed between neighboring pawls 72 a cut 74 cut upwardly from the lower edge of the second base 34. Namely, four such recesses 73 are formed as regularly spaced.
  • the first base 33 is forcibly fitted onto the second cylindrical base 34 against the effect of the small protrusions 63 on the inner surface thereof.
  • the four pawls 62 of the first base 33 are engaged, by calking, in the upper portions, respectively, of the four cuts 74 in the second base 34. Owing to this calking, the first base 33 is securely fixed to the second base 34.
  • the reference numeral 35 indicates a holder made of a synthetic resin which has a circular hole 80 into which the second base 34 assembled to the first base 33 can be inserted. Also, this holder 35 has terminals (not shown) to which the lead wired led out of the pinched portion are to be connected.
  • the lower end of the second base 34 is inserted in the circular hole 80 in the holder 35 and securely fixed to the holder 35 made of a synthetic resin by means of ultrasonic welding or any other method. More particularly, a part of the holder 35 which is softened due to the ultrasonic heating, goes into the second base 34 through the four through-holes 73 therein and is set there over the through-holes 73 to form a fixture 81 as shown in FIGS. 5 and 6.
  • the pawls 72 of the second base 34 catches the circumferential wall of the circular hole 80 in the holder 35 softened by the ultrasonic heating, and when the part of the holder 35 is set, the pawls 72 are rigidly held by the holder 35.
  • While the pinched portion 40 of the bulb 31 is introduced into the first opening 59 in the first base 33 and the second opening 70a in the second base 34.
  • the first horizontal lugs 61a formed on the first base 33 abut the upper portion of the opposite wide side faces 150 and the second horizontal lugs 61b formed on the first base 33 abut the upper portion of the narrow side faces 151.
  • the obliquely extending lugs 71 in pair formed on the second base 34 are resiliently engaged on the protrusions 42, respectively, formed on the lower portion of the wide side faces in pair.
  • the pinched portion 40 has the upper portion thereof limited by the first and second horizontal lugs 61a and 61b of the first base 33 from moving in the horizontal plane, and the lower portion thereof limited by the pair of obliquely extending lugs 71 of the second base 34 from moving in the vertical plane, namely, from tilting.
  • the width of the lug 71 namely, the length of the bent portion to the end from the top portion 70 of the second base 34, can be selected independently of the width of the pinched portion 40, namely, the distance between the wide side faces. So it is possible to extend the end of the lug 71 to the bottom of the pinched portion 40 to provide a sufficient length of the arm.
  • the first horizontal lugs 61a of the second base 33 and the obliquely extending lugs 71 of the second base 34 are positioned in a staggered relation; namely, the first horizontal lugs 61a are positioned correspondingly to the positions somewhat outer from both sides of one downwardly extending oblique lug 71.
  • the four first horizontal lugs 61a are all extended horizontally, but in case the width of the pinched portion 40 of the bulb 31 is larger than the distance between the two opposite first horizontal lugs 61a because of the clearance in the production process of the bulb 31, the first horizontal lug 61a can be engaged on the upper portion of the wide side face 150 of the pinched portion 40 while being somewhat depressed downwardly by the pinched portion 40. In this case, even if the first horizontal lug 61a is bent downwardly, it will be positioned outside the both sides of the obliquely extending lug 71, so that the lug 61a will not touch the lug 71.
  • FIGS. 15 to 17 show a variant of the aforementioned embodiment of the present invention.
  • the same or like numerals indiate the same or like elements.
  • the second base 34 is of a two-part structure, and composed of an upper base piece 34a to be fixed to the first base 33 and a lower base piece 34b which is to be fixed to the holder 35.
  • the upper base piece 34a has formed, by punching, in the top portion thereof a pair of lugs 71 and also an opening 70a in which the pinched portion 40 can be introduced.
  • the upper base piece 70 has formed at the lower end thereof joints 100 for connection with the lower base piece 34b.
  • the upper base piece 3 34a has also formed therein cuts 74 corresponding to the cuts in the aforementioned embodiment and in which the pawls 62 of the first base 33 are engaged by calking.
  • the lower base piece 34b takes the form of a small cylinder of which the outside diameter is generally equal to or slightly smaller than the inside diameter of the upper base piece 34a, and has formed at the lower portion thereof pawls 72 and through-holes 73 corresponding to those in the aforementioned embodiment.
  • FIGS. 16 and 17 show the above-mention upper and lower base piece 34a and 34b, not the first base 33.
  • the first base 33 has the pawls 62 thereof engaged, by calking, in the cuts 74 in the upper base piece 34a, and the upper base piece 34a has the lower end thereof fitted on the upper end of the lower base piece 34b.
  • the depth of the upper base piece 34a onto the lower base piece 34b is so adjusted that the filament is located in position, and thereafter the joints 100 of the upper base piece 34a are fixed to the outer circumference of the lower base piece 34b by welding or otherwise. Because it has already been described in the explanation of the first embodiment, the mounting of the bulb 31 to the first and second bases 33 and 34 will not be further described here.
  • the second base 34 is of a two-part structure having the upper and lower base pieces 34a and 34b and the filament 41 can be located in position by adjusting the position vertically.
  • FIGS. 18 and 19 show another variant of the aforementioned embodiment of the present invention.
  • same or like numerals indicate the same or like elements.
  • the first base 33 and second base 34 are vertically spaced from each other. Namely, with the top portion 58 of the first base 33 spaced from the top portion 70 of the second base 34, the engagement pawls 62 at the lower end of the first base 33 can be engaged in the cuts 74 formed in the second base 34 by calking. Because of this arrangement, the distance from the top portion of the first base 33 to the end of the obliquely extending lug 71, namely, the arm length of the obliquely extending lug 71, can be increased so that the pinched portion 40 of the bulb 31 can be held stably.

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
US07/063,392 1986-06-20 1987-06-18 Incandescent lamp unit Expired - Fee Related US4763038A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1986093322U JPS63451U (US07709020-20100504-C00041.png) 1986-06-20 1986-06-20
JP61-93322[U] 1986-06-20

Publications (1)

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US4763038A true US4763038A (en) 1988-08-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
US07/063,392 Expired - Fee Related US4763038A (en) 1986-06-20 1987-06-18 Incandescent lamp unit

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US (1) US4763038A (US07709020-20100504-C00041.png)
JP (1) JPS63451U (US07709020-20100504-C00041.png)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0384240A2 (de) * 1989-02-24 1990-08-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Kittlos gesockelte elektrische Lampe
US5041955A (en) * 1989-11-20 1991-08-20 Gte Products Corporation Vibration resistant lamp base
WO1996005610A1 (de) * 1994-08-10 1996-02-22 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Kittlos gesockelte halogenglühlampe
US5677589A (en) * 1994-05-19 1997-10-14 U.S. Philips Corporation Capped high-pressure discharge lamp
US5818154A (en) * 1994-08-10 1998-10-06 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Halogen incandescent lamp in cementless base
US20080273343A1 (en) * 2007-05-04 2008-11-06 Runions Alton E Halogen burner and receptacle assembly
US20100029165A1 (en) * 2008-08-01 2010-02-04 Gibboney Jr James W Method for Securing a Minature Blub in a Holder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262001A (en) * 1963-01-28 1966-07-19 Philips Corp Electric lamp
US4013335A (en) * 1974-07-03 1977-03-22 Egyesult Izzolampa Es. Villamossagi Resveny Tarsasag Lamp caps for halogen lamps and the like
US4295076A (en) * 1978-04-04 1981-10-13 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen M.B.H. Electric lamp with cementless attached base
US4489252A (en) * 1981-10-23 1984-12-18 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Electric lamp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262001A (en) * 1963-01-28 1966-07-19 Philips Corp Electric lamp
US4013335A (en) * 1974-07-03 1977-03-22 Egyesult Izzolampa Es. Villamossagi Resveny Tarsasag Lamp caps for halogen lamps and the like
US4295076A (en) * 1978-04-04 1981-10-13 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen M.B.H. Electric lamp with cementless attached base
US4489252A (en) * 1981-10-23 1984-12-18 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Electric lamp

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0384240A2 (de) * 1989-02-24 1990-08-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Kittlos gesockelte elektrische Lampe
EP0384240A3 (de) * 1989-02-24 1991-05-02 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Kittlos gesockelte elektrische Lampe
US5041955A (en) * 1989-11-20 1991-08-20 Gte Products Corporation Vibration resistant lamp base
US5677589A (en) * 1994-05-19 1997-10-14 U.S. Philips Corporation Capped high-pressure discharge lamp
WO1996005610A1 (de) * 1994-08-10 1996-02-22 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Kittlos gesockelte halogenglühlampe
US5818154A (en) * 1994-08-10 1998-10-06 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Halogen incandescent lamp in cementless base
US20080273343A1 (en) * 2007-05-04 2008-11-06 Runions Alton E Halogen burner and receptacle assembly
US7494262B2 (en) * 2007-05-04 2009-02-24 Honeywell International Inc. Halogen burner and receptacle assembly
US20100029165A1 (en) * 2008-08-01 2010-02-04 Gibboney Jr James W Method for Securing a Minature Blub in a Holder
US7666048B1 (en) 2008-08-01 2010-02-23 Tech Patent Licensing, Llc Method for securing a miniature bulb in a holder

Also Published As

Publication number Publication date
JPS63451U (US07709020-20100504-C00041.png) 1988-01-05

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AS Assignment

Owner name: ICHIKOH INDUSTRIES LIMITED, 10-18, HIGASHI-GOTANDA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TAKAYAMA, KAZUSHIGE;REEL/FRAME:004728/0962

Effective date: 19870601

Owner name: ICHIKOH INDUSTRIES LIMITED,JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TAKAYAMA, KAZUSHIGE;REEL/FRAME:004728/0962

Effective date: 19870601

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FP Lapsed due to failure to pay maintenance fee

Effective date: 19920809

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362